Actress Shannen Doherty, best known for her parts in "Beverly Hills 90210" and "Charmed," has been very open with her fans about her recent diagnosis of breast cancer.

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In a new interview with "Entertainment Tonight," Doherty revealed the harrowing news that her cancer has spread to her lymph nodes and that she is in the midst of chemotherapy and will soon undergo radiation treatment.

“I had breast cancer that spread to the lymph nodes, and from one of my surgeries we discovered that some of the cancer cells might have actually gone out of the lymph nodes. So for that reason, we are doing chemo, and then after chemo, I’ll do radiation,” Doherty said.

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“The unknown is always the scariest part. Is the chemo going to work? Is the radiation going to work?” she continued. “Everything else is manageable. Pain is manageable, you know, living without a breast is manageable. It’s the worry of your future and how your future is going to affect the people that you love.”

>> Actress Shannen Doherty shaves head amidst cancer battle, shares on social media​

“After my second treatment, my hair was really matted, like in dreadlocks. And I went to try and brush it out, and it just fell out. I just remember holding onto huge clumps of my hair in my hands, and just running to my mom crying, like, ‘My hair, my hair, my hair, my hair,'” she said.

>> Click here to see Doherty before shaving her head

“It was just shedding and it was driving me crazy. It was just clumps, and I was like, ‘Just grab the kitchen scissors.’ … We did stages. We did a pixie. And then we did a Mohawk, which was my favorite look. And then finally, we had to get the shaver thing and just buzz it off.”

>> Click here to see Doherty after shaving her head